Jacquard mechanism for looms.



No. 729,706. PATENTED JUNE 2, 1903.

J. VEBDOL- JAGQUVARD MECHANISM FOR LOOMS.

APPLICATION FILED JAN. 20. 1903.

110 MODEL.

wvr'wciss'as INVLN'F'OR ywnm TNE Noims PETERS co, PHDTd-LITHCL, WASHINGTON. nv c.

UNITED STATES PatentedJune 2, 1903.

JULES VERDOL, LYONS, FRANCE.

JACQUARD MECHANISM FOR LOOMS.

SPECIFICATION forming part Of Letters Patent No. 729,706, dated June 2, 1903. Application filed January 20, 1903. Serial No. 139,838. (No model.)

To (i/ZZ whom it ntcty concern:

Be it known that I, JULES VERDOL, a citizen of France, residing at Lyons, Rhone, France, have invented certain new and useful Improvements in Jacquard Mechanism for Looms, of which the following is a full, clear, and exact description.

The improvements forming the subject of the present application have for their object to enable jacquard mechanism, and particularly such mechanism employing continuous perforated paper, such as described in Let ters Patent No. 346,877, granted to me August 3, 1886, to work at an increase of speed of sufficient amount to enable them without inconvenience to work at the maximum speed of the looms for weaving to which they are applied. At present jacquard mechanism can only endure a moderate speed, which is much less than that which the loom could attain. This would result in an abrupt engagement of-the ratchet mechanism, which causes the cylinder and paper to advance, and would communicate to these latter concussions which would prevent all precision beyond a certain speed and would rapidly deteriorate the paper and the parts carrying and operating it. According to the present invention this inconvenience is suppressed bya particular arrangement of friction-pawl gearing with progressive engagement, thus suppressing shocks and insuring the stoppage of the paper at its exact position. This arrangement is represented by the accompanying drawing, which is an end elevation showing the invention applied to jacquard mechanism of Verdols system.

The cylinder a, suspended below the vertical needles of the jacquard by pivoted levers Z2, carries, as usual, a lantern-wheel c, which no longer serves to cause the cylinder to advance, but only to fix it in correct position by the holdfast-pulley d and to efiect by hand the backward motion by means of the pawlf. The forward movement of the cylinder is effected by a friction-pawl e, jointed to an arm 72, oscillating on the axle of the cylinder. The pawl e, furnished or lined with india-rubber or other adherent material 8, is applied to the circumference of a disk g, fixed to the cylinder. The hooky, which in former arrangements caused the cylinder to advance by acting on the lantern-wheel 0, acts, according to the present invention, on the tail of the pawl c. It is put in motion, as usual, by theforward motion of the lever l, and in rising vertically it produces the doulble effect of applying the pawl e to the circumference of the disk g and of causing it to advance in the direction of the arrow. At the same time the holdfast-pulley (Z is pushed back by a cam 2', fixed rigidly to the arm h, carrying the pawl, thus enabling the cylinder to rotate without shock. When the leverZ arrives near its extreme forward position, a pusher m, which is fixed to it, pushes the hook j, which abandons the'tailof the pawl 6. This latter then ceases to press on the disk 9 and returns to thercar, being drawn by the spring 70. The holdfast-pulley d, abandoned by the cam t', returns into engagement between two pins of the lantern-wheel 0, thus bringing the cylinder to and fixing it in its exact position. The cylinder can then accomplish its function uponthe needles, and when it again descends it replaces the tail of the pawl e in gear with the hookyto the position shown in the drawing. By this arrangement the paper is drawn forward without shocks, the cylinder, being always held, cannot by its inertia pass beyond the point whereit should stop, and the inconveniences due to great speed are suppressed.

What I claim as my invention, and desire to secure by Letters Patent, is-- 1., In combination in jacquard mechanism, a cylinder, a disk g thereon, a friction-pawl e pressed against the said disk g, a hook j for pushing the pawl forward, a holdfast-pulley cl arranged to fix the position of the cylinder, and means connected to the said pawl whereby the holdfast-puliey will be pushed forward on the movement of the said pawl, substantially as described. I

2. In jacquard mechanism, and especially those which utilize continuous perforated paper, the combination of a cylinder suspended below the vertical needles, pivoted levers supporting said cylinder, a lantern-wheel fixed to said cylinder, a holdfast-pulley acting against such lantern-wheel to secure the cylinder in correct position, a cam acting on said holdfast pulley, a pawl operated by hand toact on the pins of said lantern-wheel to give a'baokward motion thereto, africtionon the disk, a spring to move said friction- IO pawl to give forward motion to the cylinder, pawl backward, and a lever giving motion to an arm oscillating on the axis of the cylinder said hook, substantially as herein set forth.

to which such friction-pawl is pivoted and to In witness whereof I have hereunto set my which the cam is rigidly fixed, a lining of adhand in presence of two witnesses.

herent material to said friction-pawl, a disk JULES VERDOL. fixed to the cylinder against which such fric- Witnesses tion-pawl operates, a hook acting on the tail JEAN BARREME,

of the friction-pawl to cause the latter to act GASTON JEAUNIAUX. 

